Table 1. Experimental hydrogen generation activities of the as-synthesized photocatalystsa.
Sr. no. | Photocatalysts | H2 evolution (mmol g−1) | H2 evolution (mmol g−1 h−1) | ||
---|---|---|---|---|---|
DI-H2O seawater | DI-H2O seawater | ||||
1 | g-C3N4 | 1.86 | 7.38 | 0.31 | 1.230 |
2 | r–TiO2 | 4.98 | 11.36 | 0.83 | 1.893 |
3 | r–TiO2/g-C3N4 | 11.82 | 15.54 | 1.97 | 2.59 |
4 | Ag@g-C3N4 | 17.52 | 28.26 | 2.92 | 4.71 |
5 | Ag@r–TiO2 | 20.28 | 32.04 | 3.38 | 5.34 |
6 | Ag0.5@r–TiO2/g-C3N4 | 24.18 | 42.30 | 4.03 | 7.05 |
7 | Ag1.0@r–TiO2/g-C3N4 | 30.66 | 49.62 | 5.11 | 8.27 |
8 | Ag1.5@r–TiO2/g-C3N4 | 33.72 | 59.94 | 5.62 | 9.99 |
9 | Ag2.0@r–TiO2/g-C3N4 | 39.78 | 70.56 | 6.63 | 11.76 |
10 | Ag2.5@r–TiO2/g-C3N4 | 36.24 | 66.06 | 6.04 | 11.31 |
Optimized system includes concentrated sunlight irradiation, 4 mg dose of photocatalysts; pH = 8.0; temperature = 35 °C.